Android中如何實現版本更新
阿新 • • 發佈：2019-01-04
在Activity中
首先
// 獲取當前應用的版本號
public int getVerCode() {
int verCode = -1;
try {
verCode = getPackageManager().getPackageInfo("com.example.six", 0).versionCode;
} catch (PackageManager.NameNotFoundException e) {
}
return verCode;
}其次是呼叫一個UpdateManager類int i = getVerCode(); if (2 > i) { // 這裡來檢測版本是否需要更新 UpdateManager mUpdateManager = new UpdateManager(this); mUpdateManager.checkUpdateInfo(); } else { Toast.makeText(this, "已經是最新版本了無需更新", 0).show(); }
package com.example.utils; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import com.example.six.R; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.content.Intent; import android.net.Uri; import android.os.Handler; import android.os.Message; import android.view.LayoutInflater; import android.view.View; import android.widget.ProgressBar; public class UpdateManager { private Context mContext; // 提示語 private String updateMsg = "有最新的軟體包哦，親快下載吧~"; // 返回你需要安裝的安裝包url private String apkUrl = "http://softfile.3g.qq.com:8080/msoft/179/24659/43549/qq_hd_mini_1.4.apk"; private Dialog noticeDialog; private Dialog downloadDialog; /* 下載包安裝路徑 */ private static final String savePath = "/sdcard/updatedemo/"; private static final String saveFileName = savePath + "UpdateDemoRelease.apk"; /* 進度條與通知ui重新整理的handler和msg常量 */ private ProgressBar mProgress; private static final int DOWN_UPDATE = 1; private static final int DOWN_OVER = 2; private int progress; private Thread downLoadThread; private boolean interceptFlag = false; private Handler mHandler = new Handler() { public void handleMessage(Message msg) { switch (msg.what) { case DOWN_UPDATE: mProgress.setProgress(progress); break; case DOWN_OVER: installApk(); break; default: break; } }; }; public UpdateManager(Context context) { this.mContext = context; } // 外部介面讓主Activity呼叫 public void checkUpdateInfo() { showNoticeDialog(); } private void showNoticeDialog() { AlertDialog.Builder builder = new Builder(mContext); builder.setTitle("軟體版本更新"); builder.setMessage(updateMsg); builder.setPositiveButton("下載", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); showDownloadDialog(); } }); builder.setNegativeButton("以後再說", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); noticeDialog = builder.create(); noticeDialog.show(); } private void showDownloadDialog() { AlertDialog.Builder builder = new Builder(mContext); builder.setTitle("軟體版本更新"); final LayoutInflater inflater = LayoutInflater.from(mContext); View v = inflater.inflate(R.layout.main_progress, null); mProgress = (ProgressBar) v.findViewById(R.id.progress); builder.setView(v); builder.setNegativeButton("取消", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); interceptFlag = true; } }); downloadDialog = builder.create(); downloadDialog.show(); downloadApk(); } private Runnable mdownApkRunnable = new Runnable() { @Override public void run() { try { URL url = new URL(apkUrl); HttpURLConnection conn = (HttpURLConnection) url .openConnection(); conn.connect(); int length = conn.getContentLength(); InputStream is = conn.getInputStream(); File file = new File(savePath); if (!file.exists()) { file.mkdir(); } String apkFile = saveFileName; File ApkFile = new File(apkFile); FileOutputStream fos = new FileOutputStream(ApkFile); int count = 0; byte buf[] = new byte[1024]; do { int numread = is.read(buf); count += numread; progress = (int) (((float) count / length) * 100); // 更新進度 mHandler.sendEmptyMessage(DOWN_UPDATE); if (numread <= 0) { // 下載完成通知安裝 mHandler.sendEmptyMessage(DOWN_OVER); break; } fos.write(buf, 0, numread); } while (!interceptFlag);// 點選取消就停止下載. fos.close(); is.close(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }; /** * 下載apk * * @param url */ private void downloadApk() { downLoadThread = new Thread(mdownApkRunnable); downLoadThread.start(); } /** * 安裝apk * * @param url */ private void installApk() { File apkfile = new File(saveFileName); if (!apkfile.exists()) { return; } Intent i = new Intent(Intent.ACTION_VIEW); i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive"); mContext.startActivity(i); } }
在清單檔案中
<!-- 電話介面 --> <uses-permission android:name="android.permission.CALL_PHONE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <!-- 第三方登入 --> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_LOGS" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.GET_TASKS" /> <uses-permission android:name="android.permission.SET_DEBUG_APP" /> <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" /> <uses-permission android:name="android.permission.GET_ACCOUNTS" /> <uses-permission android:name="android.permission.USE_CREDENTIALS" /> <uses-permission android:name="android.permission.MANAGE_ACCOUNTS" /> <uses-permission android:name="android.permission.INTERNET"/>